Tracking device.



G. P. BRAND.

- TRACKING DEVICE. APPLIUATION FILED MAjY 1o, i910.

" Patented .13.11.21, 1913.

4 sHETs-SHEBT 1.

Witmcoaao G. P. BRAND.

.TRACKING DEVICE.

AAPPLIQMJON FILED 11u10. 1910,

Patented Jan. 21, 1913.

4sHEBTs-SHET 2. v

Smc/whoa' /JMLOQ G. P. BRAND.

TRACKING-DEVICE.

APPLmATIoN FILED 11111110, 1910.

' 1,051,073. Patented-111111.21, 1913.A

www

4 SHEETS-SHEET 3.

I G. P. BRAND.

TRACKING DEVICE. APPLICATION FILED MAY 1o, 1910.

1,051,073.- I vPatented Jan.21,1913.

4 SHEETST'SHEBT 4.

@f8 had GEORGE P. isiaaNn, or NEW YORK, N, Y.

TRACKING Dnvicn.

Loi-mora.

Specification of Letters Patent.

Patented Jan. 21 1.913.

- Appiioanon sied my 10,1910. semaine. so, 4 ii.

To @all ui/wm t may. concern.' j Be it known that I, GEORGE P. BRAND, a

lcitizen ofthe United States of America, and

resident 4of New York, in the county of New York and `vbtate of New York, have invented certain new and useful Improvements in Tracking Devices, of which the tollowing is a specification;

' shrinking and swelling of the paper, the` widths thereof, insuring the constant par- 'ptionof tMliein/svcment of the sheet.

vision is made for main-taining perfect aline nient ofthe music sheet. So far as I am 7 #This invent-ion relates to certain new and useful improvements in tracking devices or means for -assuring alinem'e'nt of the per- 'forations ma music sheet 'and the ,ducts of., atracker'bar in a self-playing musical iii-- strument.

y It is. a welLknownfact that iii tlieyoperation of piano playersand similar devices, much trouble has been experienced on account of the music sheet not passing over the tracker-bai' properly, that is', so that the perforations in the music sheet will properly aline` with their respective ducts in `the tracker bar. This, as is alsowell-known,

isv--occasioned from several causes:#the

uneven winding of the sheet on the spools,

unevenness in width at the opposite edges yot the sheet, and numerous other causes \\"lii'ch will be Well-known'to .those vfamiliar with this art.

Various means have' heretofore been devisedv `for overcoming this objection. I am aware that ithas been proposed to meet this requirement by gin'eans of guides en? gageable with one or both edges of the music sheet. It has also been proposed to -obviate this objection by means for automatically shitting the rollers or spools in the direction of their length. Again, it has .'beenproposed to move the tracker Lbar autoinat'ically in order to bring about the proper alinement In 4such devices, however, it has beenthe practice to shift the sheet with "relation to thev tracker bar or .the tracker bar transversely with relation to the direc- No proaware,--however, I am the first to provide means whereby the desired result accomplished'bynmintaining perfect alinenient of theimsic .sheet regardless of the .farying allel feeding' of the music sheet across the "trackerbar and` von tlietaltelup roll, sensi# tive automatiemeans-being provided for' attaining this end. I do not move the tracker bar with relation to the music sheet, noi the sheet with relation to the tra-cker bar, the

relative positions of these two parts being once obtained, the saine is at all times -main-` tained by automatic adjustment of the music spool, such adjustment being accomplished by means of an edge guide movable to actuate a valve and most sensitive in its movement, the said valve cont-.rolling a pluralit'i1 of ports, which ports, in turn, govern a phirality of piieui'natics which regulatel thc kable in other arts, such, for instance, as paper perforating machines, Weaving machines, and other devices of such anature as `teemploy a perforated sheet. 'The pneumatics which actuate the music spool are operated under low tension. The mechanism herein illustrated compensates for unevenness of the sheeton the music spool and saves the edge of the paper from running side to side on the flanges of the takefup spool, and thus prevents injury to such edges of the paper. On the rewind, the musicspool is held centrally in a fixed positionso that the paper is wound even and smooth A thereon as it is'taken from the take-up spool.

'Other objects and advantages of t-he ini vention will hereinafter appear' and the novel features thereofl will be particularly pointed out in the appended claims.

The inventioiris clearly illustrated in the accompanying drawings, which, with the numerals of reference marked thereon, form a partof this specitication, and Yin whichI vhave shown one practical en'ibodiment of the invention, but it isto be understood that the same 1s vcapable ot' `embodiment mother forms, and is subject-to changes, varia-tions,

and modifications in details,- proportions of' part-s, etc., without departing-from the spirit of vtheinvention or sacrificing any of its advantages I, therefore, do not wish to restrict myselfv to the particular construe-- tionliereinafter described, as it is evident that various lnstrumentalit-ies employed may be modified and various other changes nism ot' a piano player to illustrate the construction and application of my present improvements. Fig. 2 is a similar View on an enlarged scale showing the parts` embodying my present invention in a different position. Fig. 3 is a detail 'partly in section and partly in top plan, showing the manner of mounting the edge guide. Fig. 4 is a detail with portions broken away looking at the rear of the pneumatics, showing the connection of the rod which actuates the music spool. Fig. 5 is a vertical section on the line 55 of Fig. 1. Fig. 6 is a section l on the-line 6-6 of Fig. 5. Fig. 7 is an enlarged end view looking in'the direction of the arrow 7 in Fig. 2.. Fig. 8 is a vertical' section on the line 8 8 of Fig. 2. Fig. 9 is an enlarged sectional det-ail on-the line 9 9 of Fig. 2. Fig. 10 is an'enlarged sectional detail on the line 10-10 of Fig. 2. Fig. 11

is a front elevation of the edge. guide and attached part-s seen at the right of Fig. 2, on Vali enlarged scale. Fig. 12 is a detail showing the edge guide and valve in a different position from' what they are seen in Fig. 11, namely their normal position.

Like numerals of reference indicate like parts throughout the several views.

In carrying out the -invention the essential features thereof will, of course, be adapted to the style of machine in which they are to be employed. In the present instance, I-

have shown the applicationy of the'present invention to an automatic piano player otherwise of known construction. The parts of such player-,aside from those with which the. present invention is closely associated, have not beenv illustrated as the same are bellieved to be unnecessary. l The motor, the re-wind mechanism, the bellows and ,such

other parts as are common' to all music players may be all of any of the well-known or approved forms of construction. f

Of the parts shown, l designates thev motor, which with the `usual connections, controls-the rWind and re-wind of themusic sheet, these parts being ofthe usual or well'` known vons'tru'otion andoperating tin the .iisualmanner. `j; p 4 is aigiite boxof usual 'construction for controlling-the.tempo,` 5 being the tempo rod. Slis the connection between this gate box and the motor.4 7 is 'the'ggovernon also.

^ of.. known construction, orit may bel ofany approved -form,jit lbeing connected the.

gate by :meansof suitable l 8. 9 is a connectionv from the said governor ,7.and designed to lead to the exhaust mechamsm, not shown but of usual construction and mode of operation.

10 is a portion of the frame supporting the motor and other parts now to be described. f

l -11 is the music box or vframe constructed to support the musicspool, the tracker bar and other parts, the same being mounted upon the portion 10 of the frame in any of the well-known'l or approved ways and designed for the purpose for which such boxes are generally employed.

12 is the take-up roll and 13 the music spoolupon which the music sheet is to be wound and unwound in the usual manner.

The take-up roll may be of any of the well-known forms of construction mounted [on its shaft 14 in any wellL-known Way. 15 is a .gear wheel on saidshaft 14 meshing with the pinion 16 on the in t-he usual manner byy connection with the motor through the medium of the sprocket 18.

19 is the 'tracker with usual ducts 20. This is mounted for endwise movement in the box, suitable plates 22 being provided, if desired, to prevent 'outward displacementof said tracker bar. Endwise movement may be given this tracker bar for transposing or for the purpose of adjustment of the same to properly aline the music sheet. and this adjustment may be accomplished in any well-known way. In the present instance I have shown one convenient form which consists of the screw-threaded rod 23 aiiixed in any suitable manner to a fixed part of the music box and upon this rod is mounted a nut 24 provided with a peripheral slot in which is engaged a pin or projection 25 depending from the under side of the tracker bar and readily aixed thereto. It will thus be seen that movem nt of -t-he nut 24 along the screw-threaded r 23 will, by the engagement of the walls of aid slot with the said fixed projection 25, ove the tracker bar vone way or the other hccordin as the nut is moved.

6 is theusual spring-actuated spindle or .spool tending normally to force the same to the' right, yet subject tothe action of the tracking device.

27 's the right hand spindle orbearing wise movement in suitable bearings in the end of the. music box and in lthe vertical bar vor support 28 suitably attached to the outer end of the music box and sustained at a premeans as the rods or 'the like 2,92 as seen best iii-,Ei

'determined distance therefrom by suitablel 2.- Mounted on this spindle?? is a shaft 17 operated suitable guides 2l in the opposite ends of pintle fortheleft hand end of .the music I vfor' the music spool. It is mounted for end;

ysprocket'chain 3l which, inA turn', passes l y around the sprocket wheel 32 on the shaft 14T-whereby the music spool is rotated upon tliefre wiiid,it beingunderstood that this is .5.; normally. inactive, thatis as the music sheet is' being unwoundfr'ointhe music spool and wound on gthe take-up' roll, it' performs nov i' function; v

.l .Y is an edge guide.- It is pivotally mount.-

' edge `guidelias amember 36 elevated" above .I "theplane of 'the guide. member proper, 'a

seen .clearlyv in Fig. 2, and adapted to repad 52 carried by the arm 53, connected.

"term A"pii'iotallyf mounted, as at 40, and has falateralarmelcarrying a 'weight42 From saidlarniel there extends rearward amcniber g. 43'. seen :clearly in Figs. 7 and 8,'wliich-is in n. y the. path ofaand. designed to be actuated by .p za.

-the upper fend. 44 of the lever 45, the lower "end Vof which is ,designed to be connected withthe rewind mechanism by a rod or the likeftd This lei-"er pivotally mounted, as

att, and at 48 vis suitably connectedwith I thepinion 16, sothat the latter is moved out 'ofvcngageinent withthe gear 15 Tas the lower e'lrd Of Said lever iS .liioved to the-ri ht. As 1 `vthe said lov-ver end'isjmovedto the right, the j 1. -4 upper endwhich is made preferably roundedor cam shape'dyas seen at 49, .in its moveinc iitfnot only engages themember 4.3, so as lo 'actuate the Valve member 39, but also engagesbeneath the brake() and lifts the ,same out. of Contact with ,the disk or wheel 5l .onfthe pintle 27. At thelsame time, a brake 4atene end, as at 54', to the leiier 45, is thrown into engagement withthc pinion 15, as seen 4tension "onk the take-up roll during the rei: wind. .Y i' p y A -f The member over which the valve ineiny bei 39 .moves iss-provided with two ports andi, seen best-in Fig. ll where they are. uncovered `for there-wind, One of these f ports; communicates byu-suitable means, as

ha eX-ible tube 57, ywith `oneof the dia-- matics, by reason ofthe connections 57 and 58,. Referring to Fig-5, 59 is the diaphragm in communication with. the tube 58 and 16,() f is the diaphragm in communication with the l- '..tube .57. :These diaphragms .conti-ol 'the a5 movement'sof the valves l6l and @respon-- 7l adjustablyl and-detachably held `Nithin a y p l lrod or the like 72, by suitable means', as a ceivejthebent endl37 of ai link or the like l y i"3S ,-the other end `tif-which is suitably conf` nectedfrwith the valve member 39, which latclearlyinV Fig. 11, so as toputthe required* ism` for controlling. these pneu.

tively, as seen in Fig. 5, in a well-known way and further detailed description t-hereof does `notl seem necessary. .These valves are those which control. the, pneumatics 63 and 64 mounted in any suitable manner upon the support 65, -which mayl besupported from the music box. 66 is a bar connecting the f movable boards of the two pneumaticsand to this bar is connected` as at 67, the upper.

end of a lever 68, the lower endof'ivhich is pivotallymounted on'some suitable support, as `the support '65, 69 being the pivot ofsaid lever 68. `YVith'thisflever 68 near its pivot is connected, as at 70, one end of va rodiA set' screw 73. The! other 'end of this rod flattened, as seen at 74,111 Fig. 9, and einbraces the support or shaft 27 which carries the sprocket wheel 30,.being interposed between the collar 7 5 bearing against .the friction disk .51,- and the `hub-o1.' the like 7 6 of the sprocket Wheel 47, whereby when the rod 72 is movedv in the direction of its length by the means as hereinafter described,. the right hand spindle ofthe music. spool is .moved in one direction or-the other., It is to be understood thatthis actuation is pro -v sufficient to bring the first set of perfora- 'ma tions in the music sheet over the ducts of the tracker bar, if the perforation-s 'of the paper then be found not to lbe in perfect alinement with the ducts of the tracker bar,.the1 tracker bar is adjustedby means 'ofthe-slotted nut Hq) 24, so as to *move the tracker 'bar iii-:the one direction or the other latrallyo'ffthje maf` chine, that is in the digrectionoffthe leng'gtlir of the tracker bar, so 'as,tobring'theliolesj' in the tracker bar in perfectalineinentwitli 13,5' the perforations of the'inu'sic sheet.'4 Thisv relative position of the tracker bar and music sheet andthe aliiiement of the ducts of the tracker bar and -the perforat-ionsl of said music sheet remains unchanged regardless 120 of the position of the music sheeton the' music spool, the music sheet remaining prac-` tically in tliesame positionon I-thetr'acker baLdiiring the playingfof'-the entireipiece, theLA mechanism being sof sensitive :that 'the 12.5 least movementv laterally ofthe-'music sheet, which is hardly perceptible to 'the ey'etcauscsA automatic adjustment of the music spool tp compensate for such slightlateral movement ,of ai@ ma@ einer. when. Sieh sughi 'iatila@ j eral movement of the music sheet takes place, the edge guide 33 being in contact at all times with the adjacent edge of the music sheet follows the latter in its movements and lsuch movement causes, by reason of the movement `of the edge guide upon its pivot,

` thevalve member 39 to be moved slightly on its pivot, suliiciently to slightly expose. one edge of one of .the ports 55 or 56 and admit atmospheric air through said port and Vthrough the tube connecting the same with the appropriate diaphragmof the pneumatics. vThis inrushing air acting upon I the diaphragm actuates the corresponding .tions in valve in a well-known manner, putting the interiory of its pneumatic into communication with the exhaust and closing it to the atmosphere. This causes the pneumatic or bellows to be deflated sufficiently tov cause its .movable member to move the lever 68 and this through the connection withy the rod 72 which, with its flattened portion 74 disposed between the members 75 and 76, causes endwise-movement of the spindle or shaft 27, moving the music spool Ain the direction of its length to compensate` for the slight lateral movement of the music sheet, whereby the latter is maintained with its' perforaperfect alinement .with the lducts* of the tracker bar, This lateral movement .ofthe musicsspool servestoreturn the valve y'memberto its normalV position, practically closing both valve ports, although'i-tr-is't'o be'v i understood that the valve and valve ports may be so proportioned astoat-ialltimes permit 4an infinitesimal leakage'through each portby 'way of the bleedsv 81 into the exhaust chamber 77, butnot sullicient to actuate t-he vvalves n of the pneumatics. .By this means an infinitesimal lateral movement of the musicsheet will serve to entirely close the one port and open the other suilicient to actuate the valve of the pneumatic. It is to be understood that the lateral movement of the sheet in one direction will-cause the valve member 39 to cover the oneport and open the other port, while the opposite lateral moveme It of the music sheet will brin about a revrsal of such movements. 4In 'ig. 11 the parts are shown in the'iposition whichthey assume during re-winding, being thrown into such posit-ion bythe movement ofthe lever4 45 to the right or in the direction of the arrow seenin said figure, this lever being moved in.

any suitable manner sulliciently to bring the valve member 39 into such position as to entirely uncoverboth the-ports and 56.l

Under these conditions, atmospheric ai'r being admitted through both ports and through their connecting tubes to .the pneumatics, the pneumatics will both be held in their central position, as the condition of both is now the same, both being put into communication with the exhaust and closed tol'j the atmosphere. "As the, wind and re-l Wind mechanism is 'old and well-known inv thatthe pressure on the valve memberis the same as and controlled by the pressure in the pneumatic's. As the edge of the music sheet 1s frail and in order to makethe edge guide 'as delicate as possible against the edge of the paper, it is desirable to reduce the atmospheric pressure of the slide on the ports. To accomplish this I reduce the tension on the valve member to a minimum in order that the movement may be as sensitive as poible by operating the pneumat-ics under low tension or' throttle pressure. The tube 78v is, 90

therefore, connected with the interior of the throttle or governor pneumatic 7, while the tube 9 may be connectedwith either high or low tensionaccording to the conditions under which the player is operated. This tenl sion, however, does not. atfect'that in the in- ".terior'fof thegovernor pneumatic.- It is to beunderstood that the valve 80 is the throtjftl'e valve actingA in the well-known way.

' vlto'iifications in detailsmay be resorted to 100 withoutdeparting from the spirit of the invention or sacrificing any of its advantages.

VVhat'is claimed 'as-new is l. In4 a tracking device, a trackerlrar` means for preliminarily adjusting the same, 105 an endwise movable music spool., an edge .guide engageable with one edge only of a music sheet, and pneumatic means controlled by the edge guide for moving only said music spool in both directions endwise. 2. In a tracking device, an endwise movable music spool, a tracker, means for pre- `linfrinarily adjusting the same, an edge guide mounted for constant Contact with one edge only of a music sheet, and automatically con- 11-5` trolled pneumatic means 'g verned by said' l edge guilde` for moving sai spool only.

3. In a trackingl device, an endwise movv. able music spool. a' tracker. means for pre-l liminarily adjusting the sanre,-an edge guidel mounted for constant contact with one edge only of a music sheet, and' means-for moving such spool back and -fort-hf in4 thedirection of its length and controlled automatically by., the movement of the edge guide. 125 4. In a tracking device, anendwise movable' music spool, a relatively fixed trackerbar` an edge guide mounted for constant contact with one edge only of a music sheet and means for moving. such spool backward' 1,30

"trackerbar, a relatively 'fixed member parailel with the trackerbar and disposed entirely within the music box, a member movable on saidfixed Amember within the music Vbox and coperating means projecting from C trackerbar mounted therein' and endwise ,t movable, amember within said music box fixed relatively to the trackerbar, ajmember adjustable on said fixed member and having a peripheral slot and means rigid with the trackerbar and. projecting. at right angles therefrom andinovable therewith and received in said slot to giveendwise move- 'ment to the trackerbar.,

17. In a tracking device, a trackerbar, relatively lfixed vsupport upon which the trackerbar is mounted for endwise movement, a' screw-threaded member on said support, a peripherally grooved nut on said screw-threaded member and movable thereon with and in the same direction as the trackerbar, and means rigid with and projecting at right angles from the trackerbar and loosely spo received within the groove' of said nut .whereby adjustment of said nut moves the trackerbar.

18. In a tracking device, an endwise movable music spool, aspring actuated pintle for one end thereof, an endwise movable pintle for the-other end thereof, a relatively lixed trackerbar, an edge guide mounted for constant contact with one edge only of a music sheet, a valve mechanism controlled by the movement of the edge guide, and pneumatic means controlled by said valve mechanism for giving back and forth endwise movement to the last-named pintle and the music .spool only. i

19. In a tracking device, -a music spool, pneumatic means for-moving the same endwise, a relativelyfixed trackerbar, and a pivotally mounted. member having an upturned portion forming an edge guide, and an upturned portion at an angle thereto, and a valve controlling member pivotally connected with said angular upturned portion and with the pneumatic means.

20. In a tracking device, an endwise movable music spool, an edge guide mounted for constant contact with an edge of a music sheet, a valve member connected therewith, pneumatics connected with said music spool controlled by said valve member, and a con-l nection from said pneumatics to a low tension chamber of a pneumatic governor.

21. In a tracking device, an endwise movable music spool, an edge guide mounted for constant contact with an edge of a music sheet, a valve member connected therewith, pneumatics connected with said music spool :controlled by said valve member, 'a-connec A.tion from said pneumatics to a low tension chamber of a leading from emor. 22.' In a tracking device, an endwise movable music spool, a relatively fixed tracker, pivoted means movablepover and controlling a plurality ofports,said means mounted to be operated by'one edge of a music sheet,

music spool for causing the endwise movement of said spool only, to maintain alinement between the perforations of the music sheet and the tracker.

23, In a tracking device, a trackerbar mounted for endwise movement, a relatively fixed non-rotatable support parallel-with the trackerbar, a member adjustably and rota-- tably mounted on said support, and cooperating means projecting from the trackerbar at right angles to said fixed member for cooperation with said movable member to give endwise movement to thetrackerbar.

24. In a tracking device, an'endwise movable music spool,a relatively fixed tracker, means mounted for constant contact with the edge of a music sheet for controllingthe endwise movement of the spool, means actuated by said means movable over and controlling a plurality of ports, and pneumatic means controlled-by said ports for automatically maintaining alinement between the perforations of t-he music sheetand those of the tracker.

able music spool, a relatively fixed tracker, means operated by the edge of a music sheet movable over and controlling a plurality of ports'and means controlled by said ports for causing the endwise movement of the music spool only with relation to the tracker for maintaining alinement between the perforations of the music sheet and the tracker.

26. In a tracking device, an endwisey movable music spool, a relatively fixed tracker, means operated by Fthe edge of a music sheet movable over and controlling a plurality of ports, and means controlled by said parts for causing endwise movement of the music spool only in both directions to maintain alinement between the perforations of the music sheet and the tracker.

27. In a tracking device, an endwise movable music spool, a relatively lixed tacker, means operated by the edge of a music sheet lmovable over and controlling a plurality of ports, and pneumatic means. controlled by said ports forgcausing the endwise movement of the music spool only in both directions, and a connection from said pneumatic to a low tension chamber of a pneumatic governor.

able pintle for a music' spool, means con- :and connections between said means and the l 25. In a.tracking' device, an endwise movpneumatic governor, and a pipe`- Y the throttle valve of said gov' 28. In' a tracking device, an endwise movl nio l 'nected with said pintle for moving it in both directions, a pivotally mounted edge guide for contact With one edge only of a music sheet, pneumatic means connected to said first-named means and i valve controlled means intermediate the pneumatic means and the edge guide 4and controlled by" the latter for moving the music s'pool in both directions. i

29. In a tracking device, an endwise movable pintle lfor a music spool, `rigid means in additionto and movable with said pintle for moving it in both directions, an edge guide mounted for constant contact with one edge only of a music sheet, pneumatic means connected with said rigid means, and valve coni trolled meansintermediate said pneumatic means and edge guideand automatically 'controlled by the latter for giving back and forth endvvise movement t'o the music spool.

30. In a ,tracking device, an endwise movable pintle for a music spool, pneumatic .y meansfor operating the same endwise in both direct-ions, an 'edge guide mounted for constant contact with one edge only of a music sheet, and valve controlled means controlled by connection with the edge guide and operatively connected with said pneumeans actuated by the edge guide for movrection of its length. Y

32. In a tracking-device, an endvvise moving the said pintle back and'forth in the di-4 able pintle for a music sheet, an edge guide mounted for constant contact Withone edge only of a music sheet and interpgsed valve controlled and pneumatic means controlled Y the edge guide for giving back and forth endwise movement to the music spool only.

" 33. In atracking device, an endWise movable pintleffor a musicA spool, a relatively fixed tracker, an edge guide mounted for constant contact with and operated by one edge only of. a music-sheet and valve controlled and pneumatic means interposed be- ]tween the vedge guide and music spool for ,ifcdiiie'fus `patent may be obtained for therefor, an edgeguide mounted for constant contact with and operated by one edge only l ofa music sheet`and valve controlled means and connections actuatedby the movement of the edge guide,*'andfp neum`at1c means controlled by said valve controlled means for giving endWise movement to the music spool relatively to the tracker. v

i 35. In a tracking device, an endwise movable pintle for a music spool, a relatively -xed tracker positive means for moving said pintle in both directions, Vand an edge guide controlling said positive means, said* edge guide being always in Contact With' the edge of a sheet and vvorkingfrom-4 one edge onlyY of said sheet 4to automatically move the music spool'endvvise in both directions.

36. In a tracking. device, an endwise movable pintle tor amusic spool, positive means for moving the pintle in both directions, an edge guide, pneumatic means for o erating said positive means, valve controlle means for controlling. said pneumatic means and controlled by the' edge guide said edge guide being always. in contact Wit one e ge only of a sheet and Working against the 'fixed edge only to giveendwise movement to the music spool in both directions.

37. In a tracking'device', an endwise movable pintle for a music spool, a relatively fixed tracker, positive means for moving -said pintle rin both directions, pneumatic means for actuating said positive means, valve controlled means controlling said pneumatic means, an edge guide controlling said valve controlled means, said edge guide being pivotally mounted for constant con- 'tact with and operated by one edge onlyy of a sheet for automatically moving the musicI spool back and forth endvvise'relatively to the tracker.

Signedby meat Washington, D; C., this 47th day of' May, 1910.

.GEORGE P. BRAND.

lVitnesses: l y

E. H. BOND,

JOHN Somvnmm.

five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

